Earth Juice & General Organics Strength

What strength of nutes do you guys use that use the Earth Juice and General Organics lines of nutes? I'm speaking in regards to the light, medium, and strong strength mixtures listed on the bottle. Grow shop guy tells me to use full strength, but not sure if I should trust him and don't want to burn my girls up.

Strain dependent if you ask me, if you don't know if the strain you are growing is a heavy feeder I would start out light and see how it goes, then bump up the dose as needed.

JavaCo said:

Strain dependent if you ask me, if you don't know if the strain you are growing is a heavy feeder I would start out light and see how it goes, then bump up the dose as needed.

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Sounds good thanks. I've recently used medium strength but always seem to have that one plant that wants to start yellowing earlier than the rest. Most of them do well though. And I typically run several strains at once, only one of each though. Ive questiobed too if maybe I'm not feeding enough grow far enough into flowering? Or maybe I need an extra does of grow later in flowering?